Ancient Luzon/Moro? axe with amulet-wheel

[Indianajones]

Hi guys, here a quite interesting and puzzling piece I'd like to share. One of the oldest Luzon (?) pieces I know; to my judgement a bit after 1800(?). To my opinion the blade and the grip are put together at one time as the blade is Igorot; Kalinga and the grip is South-Philippine (perhaps chinese/japanese?).

Interesting also is the amulet engraving on the blade -etched/engraved?- in a native filipino language. Once I have looked up the signs and they represent each a lettergroup -like 'ka' 'ma'- which together would make a word or line around the wheel. Though couldnt make anything of it as one need to know the language and couldnt translate all of the signs.

My questions; would this indeed be a put-together-piece? Is the grip moro/South Philippine?
Am also very curious if anyone has/knows any other of such amulet-language-wheels or similar? And who knows we might be able to translate this . . .??